Marantz has been designing and making amplifiers for more than 65 years, and for 40 of those the products have reflected expertise of Ken Ishiwata. Now, to mark his four decades with the company, the PM-KI Ruby amplifier has been developed and tuned by a highly experienced engineering teamled by KI himself. And it arrives bearing Ken Ishiwata’s signature and a special Ruby motif.
The PM-KI Ruby is built with just one aim – audio performance – which is why it uses a fully discrete two-stage design with separate power supplies for the preamplifi er and power amp section, and draws on the design of the flagship PM-10 amplifier with its moving coil/moving magnet phono stage complete with Marantz Musical Premium Phono EQ circuit, and Marantz HDAM technology throughout for signal purity.
Purest mode offers the cleanest signal path through the amplifier, which delivers 100W per channel into 8ohm speakers, or 200Wpc into 4ohm, and there are high-quality nickel-plated input terminals, and high-purity copper speaker connections. It’s all built on a vibration-resistant double layer chassis, with thick aluminium panes for rigidity and a laser-etched Ken Ishiwata signature to set this apart as a very special amplifier.
Extensive and painstaking tuning has long been the secret of fine-sounding Marantz amplifiers, and for the PM-KI Ruby Ken Ishiwata and the Marantz engineering team used all their experience and expertise, both in the design of the amplif er and in the long listening sessions involved in finalising the sound. As you would expect for a product marking a 40-year career, the PM-KI Ruby is a real
cause for celebration, and a fine embodiment of the Marantz ethos –‘Because music matters’.
Marantz was in at the start of CD, launching its first player – the original CD-63 – in 1982. By then, Ken Ishiwata had been with the company for four years, and was to play a major role in the development of Marantz players from the start. But he went further than that: early on he realised that there was scope for highly-tuned versions of the company’s players, and thus was born the trend of Limited Edition, Special Edition and, latterly Ken Ishiwata Signature models, all designed to take the exceptional CD performance of Marantz models to the ultimate level.
Of these, perhaps the best-known is the classic CD63MkII KI-Signature, which Ishiwata describes as ‘still one of the most musical CD players we’ve produced.’ Now there’s a new classic, engineered and extensively tuned to mark Ishiwata’s 40th anniversary with Marantz – the SA-KI Ruby. Drawing on the development process for the flagship SA-10, and designed by the same team, the SA-KI Ruby features a new disc mechanism built purely for audio, the “SACD-M3”, able to play SACDs, CDs, and compilations on CD-ROM or DVD-ROM. It also has an asynchronous USB input, able to handle formats all the way up to PCM / DXD 384kHz/32bit and DSD11.2MHz, and handles all digital music with a unique Marantz Musical Mastering technology.
By upconverting all file formats to DSD, using advanced fi ltering and processing, then using employing direct 1-bit conversion to feed the analogue outputs, the SA-KI Ruby delivers a sound with vivid detail, effortless dynamics and remarkable presence – all qualities central to Marantz CD players over many generations.
The Marantz engineering team has created this player not just to mark Ishiwata’s 40th anniversary, but also to deliver the kind of sound able to bring you closer than ever to your favourite music. The reason is simple, and central to everything Marantz does – “Because music matters”.